any translation in everyday english?
how about the abstract from the patent?
Wireless local area networks must work in less than ideal environments, including environments having externally and internally generated interfering RF signals. Interfering signals can cause significant problems with signal detecting, amplifier gain adjustment, and signal decoding. Various parameters of the WLAN receiver can be adjusted to mitigate the effects of interference. By selectively adjusting sets of these parameters, receiver sensitivity and interference immunity can be advantageously balanced. In one embodiment, adjustments to these parameter sets can be made in response to different sources of interference.
Any better? From what I can gather, if the signal you are receiving has no or little interference, you will not see any benefit. But if your environment DOES have interference, either from the computer equipment itself, or from external sources such as other WLAN sources, microwave ovens etc., Atheros have a patented method of alleviating that interference to a certain degree by various means.
One method (amongst many) that they propose in the patent to alleviate interference to a received signal is to dynamically alter (read lower) the receiver sensitivity.